<template>
  <div>
    <el-switch v-model="draggable" active-text="开启拖拽" inactive-text="关闭拖拽"></el-switch>
    <el-button v-if="draggable" @click="batchSave">批量保存</el-button>
    <el-button type="danger" @click="batchDelete">批量删除</el-button>
    <el-tree
      :data="menus"
      :props="defaultProps"
      @node-click="handleNodeClick"
      :expand-on-click-node="false"
      show-checkbox
      node-key="catId"
      :default-expanded-keys="expandedKey"
      :draggable="draggable"
      :allow-drop="allowDrop"
      @node-drop="handleDrop"
      ref="menuTree"
    >
      <span class="custom-tree-node" slot-scope="{ node, data }">
        <span>{{ node.label }}</span>
        <span>
          <el-button
            v-if="node.level <= 2"
            type="text"
            size="mini"
            @click="() => append(data)"
            >Append</el-button
          >
          <el-button type="text" size="mini" @click="edit(data)"
            >Edit</el-button
          >
          <el-button
            v-if="node.childNodes.length == 0"
            type="text"
            size="mini"
            @click="() => remove(node, data)"
            >Delete</el-button
          >
          <!-- <a @click="append(data)"> Append </a> -->
          <!-- <a @click="remove(node, data)"> Delete </a> -->
        </span>
      </span>
    </el-tree>

    <el-dialog
      :visible.sync="dialogVisible"
      :title="dialogTitle"
      width="30%"
      :close-on-click-modal="false"
    >
      <el-form :model="category">
        <el-form-item label="分类名称">
          <el-input v-model="category.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="图标">
          <el-input v-model="category.icon" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="计量单位">
          <el-input v-model="category.productUnit" autocomplete="off"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="() => submitData()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
//這裡可以导入其他文件（比如：组件，工具js，第三方插件js，json等文件，图片文件等）
//例如 import 《组件名称》 from '《组件路径》';
export default {
  //import引入的组件需要注入到对象中才能使用
  components: {},
  props: {},
  //计算属性，类似data概念
  computed: {},
  data() {
    return {
      pCid:[],
      draggable:false,
      updateNodes:[],
      maxLevel:0,
      dialogTitle: "",
      dialogType: "",
      category: {
        name: "",
        parentCid: "",
        catLevel: 0,
        showStatus: 1,
        sort: 0,
        catId: null,
        icon:"",
        productUnit:"",
      },
      dialogVisible: false,
      menus: [],
      expandedKey: [],
      defaultProps: {
        children: "children",
        label: "name",
      },
    };
  },
  methods: {
    batchSave(){
      this.$http({
      url: this.$http.adornUrl('/product/category/update/sort'),
      method:'post',
      data: this.$http.adornData(this.updateNodes,false)
      }).then(({data})=>{
        this.$message({
          message: "排序修改成功",
          type: "success",
        });

           //修改成功后，刷新菜单
        this.getMenus();
        //设置默认展开的菜单
        this.expandedKey = [this.pCid];

        //复原
        this.updateNodes = [];
        this.maxLevel = 0;
        this.pCid = 0;
      })
    },
    batchDelete(){
        let checkNode = this.$refs.menuTree.getCheckedNodes();
        console.log("被选中",checkNode);

        let catIds = [];
        for(let i = 0;i<checkNode.length;i++){
          catIds.push(checkNode[i].catId);
        }

        this.$confirm(`是否批量删除【${catIds}】菜单?`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$http({
            url: this.$http.adornUrl("/product/category/delete"),
            method: "post",
            data: this.$http.adornData(catIds, false),
          }).then(({ data }) => {
            this.$message({
              message: "批量删除成功",
              type: "success",
            });
            //删除后，刷新菜单
            this.getMenus();

            //设置默认展开的菜单
            // this.expandedKey = [node.parent.data.catId];
          });
        })
        .catch(() => {});
        
    },

    allowDrop(draggingNode, dropNode, type) {
      //被拖动的当前节点以及所在的父节点总层数不能大于3

      //当前节点总层数
      console.log("drop",draggingNode,dropNode,type)
      this.countNodeLevel(draggingNode.data);
      //当前正在拖动的节点 + 父节点的深度不大于3即可
      console.log("max",this.maxLevel,draggingNode.level);
      // let deep = this.maxLevel - draggingNode.data.catLevel + 1;
      let deep = this.maxLevel - draggingNode.level + 1;
      console.log("deep",deep);
      if(type == "inner"){
        console.log("child",dropNode.level);
          return (deep + dropNode.level) <= 3;
      }else{
         console.log("parent",dropNode.parent.level);
          return (deep + dropNode.parent.level) <= 3;
      }
      
    },
    countNodeLevel(node){
        //找到所有子节点，求出最大深度
        if(node.childNodes != null && node.childNodes.length > 0){
            for(let i=0;i<node.childNodes.length;i++){
              if(node.childNodes[i].level > this.maxLevel){
                  this.maxLevel = node.childNodes[i].level;
              }
              this.countNodeLevel(node.childNodes[i]);
            }
        }
    },
    
    handleDrop(draggingNode, dropNode, dropType, ev) {
      console.log('tree drop: ', draggingNode, dropNode, dropType, ev)
      //1.当前节点最新的父节点id
      let pCid = 0;
      let siblings = null;
      if(dropType =="before" || dropType == "after"){
        pCid = dropNode.parent.data.catId == undefined ? 0 : dropNode.parent.data.catId;
        siblings = dropNode.parent.childNodes;
      }else{
        pCid = dropNode.data.catId;
        siblings = dropNode.childNodes;
      }

      this.pCid.push(pCid);

      //2.当前拖拽节点的最新顺序
      for(let i =0;i<siblings.length;i++){
        if(siblings[i].data.catId == draggingNode.data.catId){
          //如果遍历的是当前正在拖拽的节点
          let catLevel = draggingNode.level;
          if(siblings[i].level != draggingNode.level){
            //当前节点的层级发生变化
            catLevel = siblings[i].level;      
            //修改子节点层级
            this.updateChildNodeLevel(siblings[i]);
          }
           this.updateNodes.push({catId:siblings[i].data.catId,sort:i,parentCid:pCid,catLevel:catLevel});
        }else{
           this.updateNodes.push({catId:siblings[i].data.catId,sort:i});
        }
         
      }
      console.log("this.updateNodes",this.updateNodes);

      //3.当前拖拽节点的最新层级
      // this.batchSave();
    },
    updateChildNodeLevel(node){
      if(node.childNodes.length > 0){
        for(let i=0;i<node.childNodes.length;i++){
          var cNode = node.childNodes[i].data;
          this.updateNodes.push({catId:cNode.catId,catLevel:node.childNodes[i].level});
          this.updateChildNodeLevel(node.childNodes[i]);
        }
      }
      
      
    },
    handleNodeClick(data) {
      this.dialogVisible = true;
      console.log(data);
    },
    getMenus() {
      this.$http({
        url: this.$http.adornUrl("/product/category/list/tree"),
        method: "get",
      }).then(({ data }) => {
        console.log("获取到数据", data.data);
        this.menus = data.data;
      });
    },
    edit(data) {
      console.log("要修改的数据", data);
      this.dialogVisible = true;
      this.dialogType = "edit";
      this.dialogTitle = "修改分类";

      //发送请求，获取当前节点最新的数据
      this.$http({
        url: this.$http.adornUrl(`/product/category/info/${data.catId}`),
        method: "get",
      }).then(({ data }) => {
        this.category.name = data.data.name;
        this.category.catId = data.data.catId;
        this.category.icon = data.data.icon;
        this.category.productUnit = data.data.productUnit;
        this.category.parentCid = data.data.parentCid;
        this.category.catLevel = data.data.catLevel;
        this.category.showStatus = data.data.showStatus;
        this.category.sort = data.data.sort;
      });
    },
    append(data) {
      console.log("Append", data);
      this.dialogType = "add";
      this.dialogTitle = "添加分类";
      this.dialogVisible = true;
      this.category.parentCid = data.catId;
      this.category.catLevel = data.catLevel * 1 + 1;
      this.category.catId = null;
      this.category.name = "";
      this.category.productUnit = "";
      this.category.icon = "";
      this.category.showStatus =1;
      this.category.sort = 0;
    },
    submitData() {
      if (this.dialogType == "add") {
        this.addCategory();
      }
      if (this.dialogType == "edit") {
        this.editCategory();
      }
    },

    editCategory() {
      var { catId, name, icon, productUnit } = this.category;
      this.$http({
        url: this.$http.adornUrl("/product/category/update"),
        method: "post",
        data: this.$http.adornData({ catId, name, icon, productUnit }, false),
      }).then(({ data }) => {
        this.$message({
          message: "修改成功",
          type: "success",
        });

        //关闭弹框
        this.dialogVisible = false;
        //修改成功后，刷新菜单
        this.getMenus();
        console.log(this.category.parentCid);
        //设置默认展开的菜单
        this.expandedKey = [this.category.parentCid];
      });
    },

    //添加三级分类数据
    addCategory() {
      console.log("add", this.category);
      this.$http({
        url: this.$http.adornUrl("/product/category/save"),
        method: "post",
        data: this.$http.adornData(this.category, false),
      }).then(({ data }) => {
        this.$message({
          message: "保存成功",
          type: "success",
        });

        //关闭弹框
        this.dialogVisible = false;
        //保存成功后，刷新菜单
        this.getMenus();
        console.log(this.category.parentCid);
        //设置默认展开的菜单
        this.expandedKey = [this.category.parentCid];
      });
    },

    remove(node, data) {
      var ids = [data.catId];
      this.$confirm(`是否删除【${data.name}】菜单?`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$http({
            url: this.$http.adornUrl("/product/category/delete"),
            method: "post",
            data: this.$http.adornData(ids, false),
          }).then(({ data }) => {
            this.$message({
              message: "删除成功",
              type: "success",
            });
            //删除后，刷新菜单
            this.getMenus();

            //设置默认展开的菜单
            this.expandedKey = [node.parent.data.catId];
          });
        })
        .catch(() => {});

      console.log("Delete", node, data);
    },
  },
  //生命周期 - 创建之前
  beforeCreate() {},
  //生命周期 - 创建完成（可以访问当前实例this）
  created() {
    this.getMenus();
  },
  //生命周期 - 挂载之前
  beforeMount() {},
  //生命周期 - 挂载完成（可以访问DOM元素）
  mounted() {},
  //生命周期 - 更新之前
  beforeUpdate() {},
  //生命周期 - 更新之后
  updated() {},
  //生命周期 - 销毁之前之
  beforeDestroy() {},
  //生命周期 - 销毁之后
  destroyed() {},
  //如果页面有keep-alive缓存功能，这个函数会触发
  activated() {},
};
</script>

<style lang="scss" scoped>
//@import url(); 引入公共css类
</style>


<!--
<template>
  <div class="mod-config">
    <el-form :inline="true" :model="dataForm" @keyup.enter.native="getDataList()">
      <el-form-item>
        <el-input v-model="dataForm.key" placeholder="参数名" clearable></el-input>
      </el-form-item>
      <el-form-item>
        <el-button @click="getDataList()">查询</el-button>
        <el-button v-if="isAuth('product:category:save')" type="primary" @click="addOrUpdateHandle()">新增</el-button>
        <el-button v-if="isAuth('product:category:delete')" type="danger" @click="deleteHandle()" :disabled="dataListSelections.length <= 0">批量删除</el-button>
      </el-form-item>
    </el-form>
    <el-table
      :data="dataList"
      border
      v-loading="dataListLoading"
      @selection-change="selectionChangeHandle"
      style="width: 100%;">
      <el-table-column
        type="selection"
        header-align="center"
        align="center"
        width="50">
      </el-table-column>
      <el-table-column
        prop="catId"
        header-align="center"
        align="center"
        label="分类id">
      </el-table-column>
      <el-table-column
        prop="name"
        header-align="center"
        align="center"
        label="分类名称">
      </el-table-column>
      <el-table-column
        prop="parentCid"
        header-align="center"
        align="center"
        label="父分类id">
      </el-table-column>
      <el-table-column
        prop="catLevel"
        header-align="center"
        align="center"
        label="层级">
      </el-table-column>
      <el-table-column
        prop="showStatus"
        header-align="center"
        align="center"
        label="是否显示[0-不显示，1显示]">
      </el-table-column>
      <el-table-column
        prop="sort"
        header-align="center"
        align="center"
        label="排序">
      </el-table-column>
      <el-table-column
        prop="icon"
        header-align="center"
        align="center"
        label="图标地址">
      </el-table-column>
      <el-table-column
        prop="productUnit"
        header-align="center"
        align="center"
        label="计量单位">
      </el-table-column>
      <el-table-column
        prop="productCount"
        header-align="center"
        align="center"
        label="商品数量">
      </el-table-column>
      <el-table-column
        fixed="right"
        header-align="center"
        align="center"
        width="150"
        label="操作">
        <template slot-scope="scope">
          <el-button type="text" size="small" @click="addOrUpdateHandle(scope.row.catId)">修改</el-button>
          <el-button type="text" size="small" @click="deleteHandle(scope.row.catId)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <el-pagination
      @size-change="sizeChangeHandle"
      @current-change="currentChangeHandle"
      :current-page="pageIndex"
      :page-sizes="[10, 20, 50, 100]"
      :page-size="pageSize"
      :total="totalPage"
      layout="total, sizes, prev, pager, next, jumper">
    </el-pagination>
    <add-or-update v-if="addOrUpdateVisible" ref="addOrUpdate" @refreshDataList="getDataList"></add-or-update>
  </div>
</template>

<script>
  import AddOrUpdate from './category-add-or-update'
  export default {
    data () {
      return {
        dataForm: {
          key: ''
        },
        dataList: [],
        pageIndex: 1,
        pageSize: 10,
        totalPage: 0,
        dataListLoading: false,
        dataListSelections: [],
        addOrUpdateVisible: false
      }
    },
    components: {
      AddOrUpdate
    },
    activated () {
      this.getDataList()
    },
    methods: {
      // 获取数据列表
      getDataList () {
        this.dataListLoading = true
        this.$http({
          url: this.$http.adornUrl('/product/category/list'),
          method: 'get',
          params: this.$http.adornParams({
            'page': this.pageIndex,
            'limit': this.pageSize,
            'key': this.dataForm.key
          })
        }).then(({data}) => {
          if (data && data.code === 0) {
            this.dataList = data.page.list
            this.totalPage = data.page.totalCount
          } else {
            this.dataList = []
            this.totalPage = 0
          }
          this.dataListLoading = false
        })
      },
      // 每页数
      sizeChangeHandle (val) {
        this.pageSize = val
        this.pageIndex = 1
        this.getDataList()
      },
      // 当前页
      currentChangeHandle (val) {
        this.pageIndex = val
        this.getDataList()
      },
      // 多选
      selectionChangeHandle (val) {
        this.dataListSelections = val
      },
      // 新增 / 修改
      addOrUpdateHandle (id) {
        this.addOrUpdateVisible = true
        this.$nextTick(() => {
          this.$refs.addOrUpdate.init(id)
        })
      },
      // 删除
      deleteHandle (id) {
        var ids = id ? [id] : this.dataListSelections.map(item => {
          return item.catId
        })
        this.$confirm(`确定对[id=${ids.join(',')}]进行[${id ? '删除' : '批量删除'}]操作?`, '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          this.$http({
            url: this.$http.adornUrl('/product/category/delete'),
            method: 'post',
            data: this.$http.adornData(ids, false)
          }).then(({data}) => {
            if (data && data.code === 0) {
              this.$message({
                message: '操作成功',
                type: 'success',
                duration: 1500,
                onClose: () => {
                  this.getDataList()
                }
              })
            } else {
              this.$message.error(data.msg)
            }
          })
        })
      }
    }
  }

</script>
-->
